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authorHiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>2008-01-30 13:33:16 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:33:16 +0100
commit064954761254ef17fae2b84fb5a034d48a769143 (patch)
tree1b281d42a1a48e0373dbcbdc82ff9b7985ce3804 /include/asm-x86/elf.h
parent770181d99098bc141031fe0a4b1d6221258c1182 (diff)
x86: kdump failure
kdump needs ELF_CORE_COPY_REGS in crash_save_cpu(). This lack of the macro causes the following BUG. SysRq : Trigger a crashdump ------------[ cut here ]------------ kernel BUG at include/linux/elfcore.h:105! invalid opcode: 0000 [1] PREEMPT SMP Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86/elf.h')
-rw-r--r--include/asm-x86/elf.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/include/asm-x86/elf.h b/include/asm-x86/elf.h
index dab4744f9586..d9c94e707289 100644
--- a/include/asm-x86/elf.h
+++ b/include/asm-x86/elf.h
@@ -106,6 +106,31 @@ extern unsigned int vdso_enabled;
_r->ax = 0; \
} while (0)
+/*
+ * regs is struct pt_regs, pr_reg is elf_gregset_t (which is
+ * now struct_user_regs, they are different)
+ */
+
+#define ELF_CORE_COPY_REGS(pr_reg, regs) do { \
+ pr_reg[0] = regs->bx; \
+ pr_reg[1] = regs->cx; \
+ pr_reg[2] = regs->dx; \
+ pr_reg[3] = regs->si; \
+ pr_reg[4] = regs->di; \
+ pr_reg[5] = regs->bp; \
+ pr_reg[6] = regs->ax; \
+ pr_reg[7] = regs->ds & 0xffff; \
+ pr_reg[8] = regs->es & 0xffff; \
+ pr_reg[9] = regs->fs & 0xffff; \
+ savesegment(gs, pr_reg[10]); \
+ pr_reg[11] = regs->orig_ax; \
+ pr_reg[12] = regs->ip; \
+ pr_reg[13] = regs->cs & 0xffff; \
+ pr_reg[14] = regs->flags; \
+ pr_reg[15] = regs->sp; \
+ pr_reg[16] = regs->ss & 0xffff; \
+} while (0);
+
#define ELF_PLATFORM (utsname()->machine)
#define set_personality_64bit() do { } while (0)
@@ -165,6 +190,43 @@ static inline void elf_common_init(struct thread_struct *t,
} while (0)
#define COMPAT_ELF_PLATFORM ("i686")
+/*
+ * regs is struct pt_regs, pr_reg is elf_gregset_t (which is
+ * now struct_user_regs, they are different). Assumes current is the process
+ * getting dumped.
+ */
+
+#define ELF_CORE_COPY_REGS(pr_reg, regs) do { \
+ unsigned v; \
+ (pr_reg)[0] = (regs)->r15; \
+ (pr_reg)[1] = (regs)->r14; \
+ (pr_reg)[2] = (regs)->r13; \
+ (pr_reg)[3] = (regs)->r12; \
+ (pr_reg)[4] = (regs)->bp; \
+ (pr_reg)[5] = (regs)->bx; \
+ (pr_reg)[6] = (regs)->r11; \
+ (pr_reg)[7] = (regs)->r10; \
+ (pr_reg)[8] = (regs)->r9; \
+ (pr_reg)[9] = (regs)->r8; \
+ (pr_reg)[10] = (regs)->ax; \
+ (pr_reg)[11] = (regs)->cx; \
+ (pr_reg)[12] = (regs)->dx; \
+ (pr_reg)[13] = (regs)->si; \
+ (pr_reg)[14] = (regs)->di; \
+ (pr_reg)[15] = (regs)->orig_ax; \
+ (pr_reg)[16] = (regs)->ip; \
+ (pr_reg)[17] = (regs)->cs; \
+ (pr_reg)[18] = (regs)->flags; \
+ (pr_reg)[19] = (regs)->sp; \
+ (pr_reg)[20] = (regs)->ss; \
+ (pr_reg)[21] = current->thread.fs; \
+ (pr_reg)[22] = current->thread.gs; \
+ asm("movl %%ds,%0" : "=r" (v)); (pr_reg)[23] = v; \
+ asm("movl %%es,%0" : "=r" (v)); (pr_reg)[24] = v; \
+ asm("movl %%fs,%0" : "=r" (v)); (pr_reg)[25] = v; \
+ asm("movl %%gs,%0" : "=r" (v)); (pr_reg)[26] = v; \
+} while (0);
+
/* I'm not sure if we can use '-' here */
#define ELF_PLATFORM ("x86_64")
extern void set_personality_64bit(void);